Oil burner



April 17, 1928. 1,666,268

E. SKILLMAN I OIL BURNER Filed June 12. 1926 Mm avwento'c 35 his Gummy Patented Apr. 17, 1928.

UNITED STATES EDWARD SKILLMAN, OF BARTLESVILIE;

PATENT orrics.

OKLAHOMA, ASSIGNOR TO DOHERTY RE- SEARCH COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

OIL BURNER.

This invention relates to improvements in oil burners of the type in which fuel oil is atomized by a jet of steam.

The invention has among its objects to provide a burner which shall be simple in construction, efficient in operation and which shall have its oil and steam passages so constructed and arranged as to permit them to be readily cleaned. Other objects are to provide' a burner in which the fuel oil nozzle or passage is arranged above the'steam pas sage and to so arrange the passages with respect to each other that the fuel shall flow downwardly at an angle to the jet of steam. the discharge end of thesteam passage being so constructed that the steam issuing therefrom shall be in the form of a sheet on which the oil is received.

The above and other objects will more fully appear from the detailed description taken in connection with the accompanying drawing wherein:

Fig. 1 is a side elevation of the improved burner;

Fig. 2 is a front elevationof the burner viewed from the right of Fig. 1 V

Fig. 3 is a vertical section through the burner, and

Fig. 4 is a horizontal section through the burner on line 44 of Fig. 1.

' In accordance with the present invention the body of the .burner is a casting having a steam passage 10 and an oil passage 12 formed therein, the one below the other The inlet ends of these passages may be screw-threaded for connection with fuel and steam pipes not shown.

The steam passage at its discharge end has a flat roof 14 opposite and parallel to which is the flat end 16 of a screw 18 adjustably mounted in the burner body and held in a given position as by means of a lock nut 20. This screw constitutes a valve by means of which the size of the steam discharge opening or nozzle may be readily varied as desired. That portion of the screw body which projects into the steam passage is made round and smooth as indicated at 22 and makes a close fit with the sides of the steam passage as is clearly indicated at 24; and also with the bore 26 formed in a flat-topped bench 27 through which it extends whereby to more effectually maintain the flat top 16 of the screw in parallelism with the upper plane surface 16 ofthe steam passage and to prevent leakage of steam around the valve.

Beyond the side walls 2 1 the steam passage flares outwardly as indicated at 28 whereby to permit the steam issuing from between the plane surfaces. to expand later ally while still confined between the two plane surfaces 1416. The outer edge of the plane surface 14 preferably terminates in an arcuate lip 30 conforming with the cylindrical surface 22 of the valve. Those portions of the plane'surfaces 14; and 16 extending forwardly between the flaring sides 28 may for convenience of description be termed the lips of the steam nozzle.

The oil passage 12 includes a downwardly extending bore 32 of relatively large diameter. the bore opening through the front face 34 of the burner body. This front face is preferably in a plane parallel to the axis of the screw valve 18. the upper lip 30 of the steam nozzle extending beyond the plane of the face as clearly shown in Fig. 1. It

will be seen from Fig. 3 that the dividing wall between the steam nozzle and the oil nozzle is in theform of a wedge 36 which extends back from the edge of the upper lip 30 of the steam nozzle. I V

The diameter of the bore 32 is preferably approximatelythe same as the width of the steam nozzle atits narrowest part as will be seen by reference to Fig. 2.

- It will'now be seen that as the fuel oil issues from its nozzle it will impinge at an angle on the jet of steam issuing in the form of a flat sheet from between the plane surfaces or lips ofrthe steam nozzle and will be carried forward by the steam for burning in a firebox not shown. By causing the oil to be deposited on the steam jetfrom above through a relatively large nozzle little or no pressure need be put on the oil to cause it to flow into the path of the moving stream. Further, dirty oil can be burned .without danger of clogging the oil passage.

Burners constructed in accordance with the present invention can be cheaply constructed function efficiently on a relatively low grade of fuel oil, and are admirably adapted for oil field use.

lVhat is claimed as new is:

1. A fuel oil burner comprising a body having a steam passage therein, the outlet of the passage being formed by two opposed parallel plane surfaces one of which is con stituted by a screw adjustably mounted in the body, a fuel nozzle extending back and upwardly from said plane surfaces at an acute angle with respect thereto whereby fuel oil-issuing from the fuel nozzle is received at an acute angle on the sheet of steam issuing from between said plane surfaces, the bore of the fuel nozzle being circular in cross-section and the end thereof being formed on a slant which is substantially perpendicular to the plane surfaces of the steam outlet.

2. A body having a steam passage extending theret-hrough, the passage at its discharge end having a flat roof and outwardly diverging side walls between the roof and bottom of the passage, the restricted portion between the walls forming a throat through which the steam passes, a cylindrical member in the throat of the passage, said member having a flat end in spaced parallel relationwith the roof of the passage, said member being longitudinally adjustable in the body toward and from the flat roof of the'passage, the space between the flat surfaces forming a steam orifice, and an oil passage above the steam passage extending downwardly at an angle to said plane surfaces, the top of the'oil passage terminatin'g inwardly of the bottom thereof.

3. A body having a steam passage extending therethrough, the passage at its discharge end having aflat roof and outwardly diverging side walls between the roof and bottom of the passage, the restricted portion between the walls forming a throat through which the steam passes, a member extending across the throat of the passage, said member having a flat end in spaced parallel relation with the roof of the passage and being longitudinally ad-' having two passages extending therethrough in a common direction one above the other, the upper passage extending downwardly and forwardly, the lower passage having gradually converging sides terminating in a restricted throat the sides continuing be yond said throat in gradually diverging relation, the top and bottom of the passage between said sides being fiat and in relatively close relation.

5. A fuel oil burner comprising a body having two passages extending therethrough in a common direction one above the other, the upper passage extending downwardly and forwardly, the'lower passage having gradually converging sides terminating in a restricted throat the sides continuing beyond said throat in gradually diverging relation, the top and bottom of the passage between said sides being flat and in relatively close relation, and a flat-topped men'rber positioned across said throat and adjustable to ward and from the top thereof.

6. A fuel oil burner comprising a. casting having two cored passages extending therethrough one above the other, the upper passage extending downwardly and forward- 1y with respect to the lower passage, the lower passage having at its outlet end'a fiat roof and a flat bench therebelow, and means extending through the bench from below adapted to restrict the discharge opening between the roof and bench,

'7. A fuel oil burner comprising a casting having two cored passages extending therethrough one above the other, the upper pas sage extending vdownwardly and forwardly with respect to the lower passage and be ing substantially round in transverse section, the lower passage being rectangular in cross-section at its out-let end, and means for varying the eifective size of the discharge passage through the rectangular opemn In testimony whereof I aliix my signa ture. a i V EDWARD SKILLMAN. 

